Whenever you cast your first spell during each opponent's turn, look at the top card of that player's library, then exile it face down. You may play that card for as long as it remains exiled, and mana of any type can be spent to cast it.
Near Mint - $3,200
Lightly Played - $2,600
Moderately Played - $2,300
Heavily Played - $1,900
Damaged - $1,600
Near Mint Spanish - $3,200
Lightly Played Spanish - $2,600
Moderately Played Spanish - $2,300
Heavily Played Spanish - $1,900
Damaged Spanish - $1,600